Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/10595
Title: Age-Induced Diminution of Free Radical Scavenging Capacity in Bee Pollens and the Contribution of Constituent Flavonoids
Authors: Campos, Maria G. 
Webby, Rosemary F. 
Markham, Kenneth R. 
Mitchell, Kevin A. 
Cunha, António P. da 
Keywords: Bee pollen; Free radical scavenging activity; A,α-diphenyl-β-picrylhydrazyl; DPPH; Quality control; Aging
Issue Date: 29-Jan-2003
Publisher: American Chemical Society
Citation: Journal of Agricultural and Food Chemistry. 51:3 (2003) 742-745
Abstract: Bee-collected pollen (“bee pollen”) is promoted as a health food with a wide range of nutritional and therapeutic properties. The objective of the current study is to evaluate the contribution made through the free radical scavenging capability of bee-collected floval pollens by their flavonoid/phenolics constituents, and to determine whether this capability is affected by aging. The free radical scavenging effectiveness of a bee pollen (EC50) as measured by the DPPH method is shown to be determined by the nature and levels of the constituent floral pollens, which can be assayed via their phenolics profiles by HPLC. Each pure floral pollen has been found to possess a consistent EC50 value, irrespective of its geographic origin or date of collection, and the EC50 value is determined to a large extent (ca. 50%) by the nature and the levels of the pollen's flavonoids and phenolic acids. Non-phenolic antioxidants, possibly proteins, account for the balance of the activity. Pollen aging over 3 years is demonstrated to reduce the free radical scavenging activity by up to 50% in the most active floral pollens, which tend to contain the highest levels of flavonoids/phenolic acids. It is suggested that the freshness of a bee pollen may be determined from its free radical scavenging capacity relative to that of fresh bee pollen containing the same floral pollen mix.
URI: http://hdl.handle.net/10316/10595
ISSN: 0021-8561
DOI: 10.1021/jf0206466
Rights: openAccess
Appears in Collections:FFUC- Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
Age-Induced Diminution of Free Radical Scavenging Capacity.pdf88 kBAdobe PDFView/Open
Show full item record

SCOPUSTM   
Citations

129
checked on Feb 18, 2020

WEB OF SCIENCETM
Citations 1

144
checked on Aug 2, 2022

Page view(s) 20

570
checked on Aug 4, 2022

Download(s) 50

585
checked on Aug 4, 2022

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.